Which is true about ionic radius of M²⁺?

(1) Ni²⁺<Cu²⁺<Zn²⁺

(2) Ni²⁺>Cu²⁺>Zn²⁺

(3) Cu²⁺<Ni²⁺<Zn²⁺

(4) Zn²⁺<Ni²⁺<Cu²⁺

Which of the following will not give a positive chromyl chloride test?

(1) CuCl₂

(2) ZnCl₂

(3) HgCl₂

(4) NH₄Cl

What is the n-factor ratio when KMnO₄ reacts with conc. HCl?

(1) 3:4

(2) 8:1

(3) 16:1

(4) 2:1

Which of the following can not exist together in aqueous solution?

(1) HgCl₂ and SnCl₂

(2) HgCl₂ and SnCl₄

(3) SnCl₄ and FeCl₃

(4) SnCl₄ and PbCl₄

A substance is found to have a magnetic moment of 3.9 B.M. The ion may be 

(1) Fe⁺³

(2) Mn⁺²

(3) Co⁺²

(4) Cu⁺²

When an excess of KCN is added to a solution of CuSO₄, the final product obtained is :

1. K₂[Cu(CN)₄]

2. K₃[Cu(CN)₄]

3. CuCN

4. K[Cu(CN)₂]

Which of the following atomic numbers is not the atomic number of the inner transition element: 29, 59, 74, 95, 102, 104?

(1) 59

(2) 95

(3) 102

(4) 104

Which of the following is the correct order of second ionization energy?

(1) V>Cr>Mn

(2) V<Cr<Mn

(3) V<Cr>Mn

(4) V>Cr<Mn

When dimethyl glyoxime is subjected to reflux with pure nickel sheet pieces in an appropriate solvent for 10 minutes, what is the outcome?

(1) Red precipitate

(2) Blue precipitate

(3) Yellow precipitate

(4) No precipitate

While Fe³⁺ is stable, Mn³⁺ is not stable in acidic solution because

(1) O₂ oxidises Mn²⁺ to Mn³⁺

(2) O₂ oxidises both Mn⁺² to Mn⁺³ and Fe²⁺ to Fe³⁺

(3) Fe³⁺ oxidises H₂O to O₂

(4) Mn^{3+ o}xidises H₂O to O₂